What’s on TV Wednesday

“Nature” tugs at the heartstrings with cute animals in need; “black-ish” flashes back to “Good Times”; Stephen Hawking helps us think like him; and the families that gave us Johnny Cash and June Carter Cash tell their musical story.

What’s on TV

JUNGLE ANIMAL HOSPITAL8 p.m. on PBS. “Nature” visits the Arcas Wildlife Rescue Center in Guatemala, where creatures from the second-largest tropical rain forest in the Americas are rehabilitated before being released back into the wild. Impossible to resist: the baby spider monkey with enormous eyes who is given a teddy bear to hug as a surrogate mother so she won’t bond too closely with her human handlers. Aww.

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Jamila Velazquez and Bryshere Gray in “Empire.”CreditChuck Hodes/Fox

EMPIRE9 p.m. on Fox. Jamal refuses to make music until family members stop squabbling. Anika is being pressured to testify against Lucious. And Cookie organizes an intervention at Hakeem and Laura’s wedding.

MODERN FAMILY9 p.m. on ABC. Lily is pulled in opposite directions by her two dads after Cameron takes a summer job in Kansas City. In “black-ish,” at 9:30, Dre dreams that he has been transported to the 1970s hit “Good Times.”

GENIUS BY STEPHEN HAWKING9 p.m. on PBS. Mr. Hawking tries to prove that ordinary people can think like renowned physicists — in other words, like him — by having them undertake physical and mental challenges, starting with a time-travel experiment involving DeLoreans, atomic clocks, a black hole and New York. At 10, he asks his charges to prove the likelihood that we’re not alone in the universe.

What’s Streaming

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June Carter and Johnny Cash.CreditArgot Pictures

THE WINDING STREAM: THE CARTERS, THE CASHES AND THE COURSE OF COUNTRY MUSIC (2015) on Amazon and iTunes. Beth Harrington’s oral history of the Carter and Cash families — the ones that gave us June and Johnny — weaves vintage recordings and live performances with the voices of members past and present and musicians including Sheryl Crow and George Jones. “Leading us from Poor Valley, Va. — where the seventh generation of Carters still attends the church that its patriarch, A. P., built in 1906 — through decades of personal and professional landmarks, Ms. Harrington sweeps divorce, disappointment and the Great Depression into a single, upbeat package,” Jeannette Catsoulis wrote in The New York Times.

NEW YORK STORIES OPEN MIC NIGHT8 p.m. on Thirteen.org/openmic. Eighteen New York-based singers, actors, dancers, storytellers and comedians strut their stuff at the Tisch WNET Studios at Lincoln Center.

OH MY VENUS on Hulu and DramaFever. Before succumbing to that midafternoon Oreo while handcuffed to your desk, check out this strangely addictive South Korean series about a trainer to the stars who tries to whip an overweight lawyer into fighting shape after her longtime boyfriend dumps her for a thinner woman.